单项选择题

Passage Three
Questions 32 to 35 are based on the passage you have just heard.

A．It has an intense gravity.
B．It can change space and time in basic ways.
C．Nothing can escape from it.
D．It has been predicted by theory but never confirmed.
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单项选择题
A．Nicotine.B．Ashes.C．Smoke.D．Tar.
A．Nicotine.
B．Ashes.
C．Smoke.
D．Tar.
单项选择题
A．Teacher and student.B．Manager and guest.C．Receptionist and guest.D．Friends.
A．Teacher and student.
B．Manager and guest.
C．Receptionist and guest.
D．Friends.
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